Sciencemadness Discussion Board

Gas-Phase Free-Radical Halogenation

DFliyerz - 11-9-2015 at 07:25

Has anyone here tried a gas phase free radical halogenation in a home lab set up, say with commercial propane or butane and chlorine? If so, how did it go? What equipment did you need?

aga - 11-9-2015 at 07:41

Would that be the same as reacting chlorine gas with sulphur for example ?

DFliyerz - 11-9-2015 at 08:30

Not quite sure. I'm currently devising a ground glass setup for the process, and I'll post a sketch of it once I figure it out.

aga - 11-9-2015 at 08:37

Here's some photos from TFSE, U'd :-

http://www.sciencemadness.org/talk/viewthread.php?tid=10377

http://www.sciencemadness.org/talk/viewthread.php?tid=61903

http://www.sciencemadness.org/talk/viewthread.php?tid=62254

DFliyerz - 11-9-2015 at 09:37

Here's a very rough sketch of what I think would be a good apparatus:

1441993040856-2127646239.jpg - 2.8MB

DFliyerz - 11-9-2015 at 09:57

Also, I found this interesting tidbit: https://en.wikipedia.org/wiki/Free-radical_halogenation

Right at the bottom of the article, what looks to be a very easy free-radical bromination.

aga - 11-9-2015 at 10:00

I know nothing much, but surely the pressures are important ?

e.g. if your Halgoen, Alkane and Products are all lighter than air, then a V type arrangement may be better, then there's the reaction producing pressure (maybe) etc etc.